Reversing-valve for compressed-air motors.



PATBNTED MAR.'3., 1903.:

J. KELLER. REVERSING VALVE POR GOMPRESSBD AIR MOTORS.

APPLICATION FILED SEPT. 4,. 1902.

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l J. KELLER. REVBRSING VLVE PoR GOMPRESSED AIR MOTQRS.

APPLIOATION FILED SEPT. 4. 1902.

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JULIUS KELLER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO PHILADELPHIA PNEUMATIC TOOL COMPANY, A CORPORATION OF NE'W JERSEY.

REVERSlNG-VALVE FOR COMPRESSED-AlR MOTORS.

SPECIFICATION forming part of Letters Patent No. 722,179, dated March 3, 1903.

Original application filed August 13, 1902, Serial No. 119,479. No. 122,021.

To all wtmn t may concern:

Be it known that 1, JULIUs KELLER, a citizen of the United States, residing in the city and county of Philadelphia, State of Penn- Sylvania, have invented a new and useful Improvement in Reversing-Valves for Compressed-Air Motors, of which the following is a specification.

My invention consists of a novel construetion of a reversing-valve which is especially adapted for controlling the direction of rotation of rotary motors of the general character constructed by me in accordance with my Patent No. 646,702, granted April 3, 1900, said motors being adapted for a great variety of uses, such as drilling or boring wood or metal, reaming, tapping, polishing mosaic floors, rotating brushes or similar devices for cleaning or other purposes. In this patent I have shown, described, and claimed a very efficient construction of a reversing-valve which is rotatably mounted upon a tube which serves as the inlet-passage for the motive fluid. I have found it, however, in some cases to be desirable to employ a somewhat differently constructed and located reversing valve, which is located within the engine-cylinder and is provided with ports and passages adapted to control the inlet, exhaust, and reversal of the motive fluid in an exceedingly efficient manner.

In a contemporaneously-pending application filed by me August 13, 1902, bearing Serial No. 119,479, of which this application is a division, I have shown, described, and claimed a reversing-valve in combination with my improved form of rotary motor or pneumatic drill; Vbut the present application is designed to protect, broadly, the construction of rotary reversing-valve per Se, and to the general combination recited in the claims of my contemporaneouslylpending application aforesaid I herein make no claim.

To the above ends, therefore, the present invention consists of an improved construction of a reversing-valve, the novel features of which will be hereinafter fully set forth, and particularly pointed out in the claims.

Figure 1 represents a perspective view of a Divided and this application filed September 4, 1902. Serial (No model.)

reversing valve embodying my invention. Fig. 2 represents a vertical section, partly in elevation, of a rotary pneumatic portable drill to which my novel reversing-valve is especially applicable. Fig. 3 represents a sectionV on line o@ so, Fig. 2.

Similar numerals of reference indicate corresponding parts in the figures. Referringto the drawings, 1 designates my novel construction of reversing-valve, the same consisting of a cylinder 2, having the passage 3 therethrough terminating in the upper wall 5 and provided with ports 4e, passing through the side wall thereof, said reversing-valve having its baseV resting on the top Wall V6 of the exhaust-chamber 7, it being apparent that said valve exhausts downwardly through the passage 3 into said chamber 7 through the port 8 in the top Wall 6 thereof.

9 designates a stem projecting from the upper extremity of the valve and passing through the top 2O of the engine-cylinder, said valve having the portion 10 of the handle 11 secured thereto, said handle having the down wardly-deflected member 12 and the laterallyextending member 13, which is adapted to be manipulated by the thumb, finger, or hand of the operator, said handle being held in position by the pin or other fastening device 14.

15 designates an inlet-passage for the motive fluid, which passes around the longitudinelly-extending groove or recess 16 in the valve and is conducted into either the chamber 17 or 18, according to requirements,where by the rotary engine 19 is operated, the exhaust entering the valve through the ports 4 in the side thereof in each instance and passing downwardly into the exhaust-chamber 7.

It will be apparent that the drill is held in position by the diametric handles shown herein and described in my prior patent and pending application, so that by terminating the lower member 13 of the handle 11 in about the position seen in Fig. 2 the reversing-valve can be readily manipulated by a finger or fingers of the same hand which grasps the adjacent diametric handle.

By constructing and locating the reversing-v valve in the position shown I am enabled to assemble the parts composing the drill into a very light, compact, and efficient structure and am enabled to produce a drill which is very eiiicient and compact in operation and which has been proved in practice to be superior to any other drill upon the market by reason of the peculiar construction, combination, and manner of assembling the reversingvalve and its adjuncts, since it is very important in certain kinds of work, such as tapping, that provision be made for instantly reversing the direction of the motor according to requirements.

In Figs. 2 and 3 I have shown a preferred construction of apparatus to which my valve is applicable; but as the same forms no part of my present invention I have deemed a detailed description thereof unnecessary, as the construction and operation of the same are fully set forth in my patent and' pending application hereinabove referred to.

I desire it understood that my novel formof reversing-valve is equally well adapted for any class of iiuid-pressure-operated motors irrespective of the use to which the same may be put, and it is equally well adapted to portable rotary pneumatic drills for boring wood as for drills of this character for boring metal, since it is well known that the same apparatus is equally adapted for both purposes and that it frequently requires more power to bore wood than to drill metal.

It will be apparent that various changes may be made by those skilled in the art which Will come within the scope of my invention, and I do not, therefore, desire to be limited in every instance to the exact construction herein shown and described.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isfl. A reversing-valve, consisting of a cylinder, a passage therethrough, open at its bottom and closed at its top, a longitudinally-extending external groove on one side of said valve, and ports on the opposite side of said valve, whereby the latter is adapted to permit the entrance and exhaust of the motive fluid, the latter initially passing around said groove, in combination with an engine-cylinder in which said valve is mounted, handles therefor, one of said handles serving as an inlet-pipe, said valve being located in said cylinder between the rotary engine and said handle.

2. A reversing-valve, consisting of a cylinder, a passage therethrough, open at its bottom and closed at its top, a longitudinally-extending external groove in one side of said valve, ports in the opposite side of said valve, and a stem projecting from the top of said valve, and adapted to have the operating means applied thereto, in combination with an engine-cylinder in which said valve is mounted, handles therefor, one of said handles serving as an inlet-pipe, said valve being located in said cylinder between the rotary engine and said handle.

3. A reversing-valve, consisting of a cylinder, a passage therethrough open at its bottom and closed at its top, a longitudinally-extending external groove on one side of said valve, ports in the opposite side of said valve, whereby the latter is adapted to permit the entrance and exhaust of the motive fluid, a

.stem projecting from the upper portion of said valve, and a handle secured to said stem and having laterally, downwardly and outwardly deflected portions, whereby said valve can be readily manipulated, in combination with an engine-cylinder in which said valve is mounted, handles therefor, one of said handles serving as an inlet-pipe, said valve being located in said cylinder between the rotary engine and said handle.

Ll. The combination of an engine-cylinder, an exhaust-chamber, upon the top of which said cylinder is supported and a reversingvalve located within said cylinder and having its lower portion resting upon the top of said exhaust-chamber, said reversing-valve consisting of a cylinder, a passage therethrough, open at its bottom and closed at its top, -a groove on one side of said valve, ports in the side of said valve opposite to said groove, and means for operating said valve.

5. The combination of an engine-cylinder, an exhaust-chamber upon the top of which said cylinder is supported, a reversing-valve located within said cylinder, and having its lower portion resting upon the top of said exhaust-chamber, said valve consisting of a cylinder, a passage therethrough open at its bottom and closed at its top, a groove on one side of said valve, ports in the opposite side of said valve, an inlet-pipe leading the motive fluid to said cylinder, and discharging around said groove, said inlet-pipe being adapted to serve as a handle, a stem projecting upwardly from said valve through the top of said cylinder, and a handle secured to said stem and having a laterally, downwardly, and outwardly deflected portion, said last-mentioned portion terminating in proximity to said inlet-pipe.

6. The combination of an engine-cylinder, diametri@ handles therefor, one of sai'd handles serving as the inlet for the motive iluid, a reversing-valve in said engine-cylinder extending longitudinally thereof and located intermediate of said inlet and the rotary engine in said cylinder, and a handle for said valve having its extremity terminating in proximity to one of said diametric handles, whereby the same hand grasping the latter can manipulate said reversing-valve handle.

7. The combination of an engine-cylinder, diametric handles therefor, one of said handles serving as the inlet for the motive fluid, a reversing-valve in said engine-cylinder, said valve consisting of a hollow cylinder, exteriorly grooved, located intermediate of said inlet and the engine in said cylinder, and a IOO IIO

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handle for said valve having its extremity deected downwardly and outwardly and terminating in proximity to one of said diametric handles, whereby the same hand grasping the latter can manipulate said reversing-valve handle.

8. The combination of'an engine-cylinder, a rotary engine therein, handles therefor, one of said handles serving as the inlet for the motive fluid, a reversing-valve in said cylinder, said valve extending in alinement with the axis of said rotary engine and being located intermediate of the inlet to said cylinder and said rotary engine, and a handle for said valve terminating in proximity to one of said engine-cylinder handles.

9. The combination of an engine-cylinder, a rotary engine therein, diametric handles therefor, one of said handles serving as the inlet for the motive fluid, a reversing-valve in said cylinder, said valve extending in alinement with the axis of said rotary engine and being located intermediate of the inlet to said cylinder and said rotary engine, and a handle for said valve terminating in proximity to one of said diametric handles.

10. The combination of an engine-cylinder, handles therefor, a reversing-valve extending longitudinally of said cylinder, and a handle for said valve extending downwardly and outwardly and terminating in proximity to one of said engine-cylinder handles.

1l. The combination of an engine-cylinder, a rotary engine therein, an inlet-pipe discharging into said cylinder, a reversing-Valve consisting of a hollow cylinder, exteriorly grooved, located intermediate of said inletpipe and engine, and extending longitudinally of said engine-cylinder, an exhaustchamber below said engine cylinder into which said reversing-valve discharges and a handle for said reversing-valve extending therefrom.

12. The combination of an engine-cylinder, handles therefor, one of said handles serving as an inlet-pipe, a rotary engine in said cylinder, a reversing-valve located in said cylinder intermediate of said engine and inletpipe, said valve having a longitudinally-extending groove vin communication with said inlet-pipe, a passage therethrough open at its bottom and closed at its top, ports in the side of said valve opposite said groove and means for operating said Valve.

13. The combination of an engine-cylinder, handles therefor, one of said handles serving as an inlet-pipe, a rotary engine in said cylinder, a reversing-valve located in said cylinder intermediate of said engine and inletpipe, said valve having a longitudinally-extending groove in communication with said inlet-pipe, a passage therethrough open at its bottom and closed at its top, portsin theside of said valve opposite said groove, and a handle for operating said valve, the extremity of said handle being deflected and terminating in proximity to said inlet-pipe.

14. The combination of an engine-cylinder, a rotary engine therein, handles therefor, an exhaust-chamber below said cylinder, a reversing-valve in said cylinder extending in longitudinal alinement with the axis of said engine and consisting of the hollow cylinder exteriorly grooved and adapted to discharge into said exhaust-chamber, and a handle for said reversing-valve terminating in proximity to one of said engine-cylinder handles.

JULIUS KELLER.

Witnesses:

JOHN A. WInDERsHnIM, E. HAYWARD FAIRBANKS. 

